The absolute magnitudes of LMC RR Lyrae variables and the ages of Galactic globular clusters

Details The absolute magnitudes of LMC RR Lyrae variables and the ages of Galactic globular clusters The absolute magnitudes of LMC RR Lyrae variables and the ages of Galactic globular clusters

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390l..81w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. L81-L84.

Astronomy and Astrophysics

Astrophysics

209

Astrometry, Globular Clusters, Magellanic Clouds, Stellar Magnitude, Variable Stars, Astronomical Photometry, Calibrating, Color-Magnitude Diagram

Scientific paper

The calibration of metal-poor LMC-cluster RR Lyraes is conducted using a value for the distance to the LMC that is based on more established data. A total of 182 RR Lyrae variables are examined by means of CCD photometry, and the mean magnitude for the variables is 0.44 at Fe/H = -1.9. The value is shown to be brighter than those suggested by statistical parallax analyses of the objects and therefore has important implications for Galactic distances.

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